tongue in cheek What you really mean is there are too many bad ones out there, and that I can agree with.
A to-do list is a basic list; a truly GTD centric system hasn't been created yet. Some people have added the words GTD to their ideas but in reality looking through commentary (and using them), most of those applications fall way short of the intended goals.
I've yet to see a funded, well built team, with UI, IA, and mobile experts assembled to do battle on the front. Thus far it's been very small part-time teams doing what they do to scratch their basic itch.
This will be an interesting project to see what fruits.
I'm interested, what bearing does our use of Rails have on whether the product is useful? If we had used Java, PHP, or Python would it really be different?
If the argument is just that there are too many web services for managing your to-do list, I might agree--we analyzed them all when writing our business plan. But, the reality is that none of them scratch our itch. And it's not that we're perfectionists; I've never met anyone who's passionately in love with their online to-do list. We intend to change that.
Well, maybe you'll succeed where others have failed, I sincerely wish you good fortune.
However, it just seems to be a space that a lot of people have tried. A lot of the apps aren't very good, true, but others are, and it shows signs that it's heading towards being a commodity, along the lines of web mail. To do something people will pay for, it's got to be head and shoulders above the competition, and be seriously useful to companies.
And there's nothing wrong with Rails at all - quite the contrary - I use it extensively myself, and absolutely love it. Just that a lot of people, myself included, seem to end up making a todo list app with it.
http://stufftodo.dedasys.com